Fluke BT521 Battery Analyzer
The Fluke BT521 is the flagship model of Fluke’s BT500 series, delivering advanced battery testing capabilities in a compact, portable package. Designed for stationary battery systems, the BT521 performs voltage, resistance, temperature, and current analysis with unmatched precision. It includes an intelligent test probe with infrared sensing, an internal memory for up to 999 test records, and USB connectivity for full data logging and reporting.
Technical Specifications
- Model: BT521
- Function: Advanced Battery Analyser
- Applications: Stationary batteries, backup systems, UPS batteries
- Voltage Measurement: AC/DC battery voltage
- Resistance Measurement: Internal battery resistance
- Temperature Measurement: Non-contact infrared sensor
- Ripple Voltage & Frequency: Measured for diagnostic analysis
- Current Measurement: AC/DC using included i410 current clamp
- Test Sequence Mode: Yes (via BTL21 intelligent probe)
Electrical & Performance
- Voltage Range: Suitable for low-voltage and backup systems
- Resistance Range: Optimized for internal battery impedance testing
- Comparison Function: Configurable resistance/voltage thresholds
- Data Logging: 999 record memory with time-stamp
- User Interface: Guided setup with audio/visual feedback
Power & Connectivity
- Power Source: Rechargeable lithium-ion battery
- Charging: AC charger included
- PC Connectivity: USB cable included for data transfer
- Software: FlukeView Battery Management Software
Environmental & Safety
- Safety Rating: CAT III 600 V
- Form Factor: Handheld DMM-style body
- Display: Dual – Main unit LCD and probe-mounted LCD
- Operating Use: Industrial battery rooms, substations, telecom setups
Included Accessories
- Fluke BT520 Battery Analyser
- BTL21 Intelligent Test Probe Set with extender & temp sensor
- i410 AC/DC Current Clamp
- BTL10 Basic Test Leads (Set)
- 4-Wire Test Pin Set
- TL175 TwistGuard Leads with Adapter
- 2× L300 LED Torches
- Lithium Ion Battery + AC Charger
- Mini USB Cable
- Magnetic Hanging Strap, Shoulder & Belt Straps
- Soft Carry Case
- 2× Spare Fuses
- 100× Paper Battery Tags
Key Features & Benefits
✅ All-in-One Testing: Measures voltage, resistance, temperature, and current.
✅ Intelligent Test Probe: Built-in LCD display with non-contact IR sensor.
✅ Sequence Mode: Guided step-by-step battery bank testing.
✅ PC Data Logging: USB export with FlukeView software included.
✅ CAT III 600 V Safety: Trusted performance in critical systems.
📦 Buy Fluke BT521 Battery Analyser from Drive Outlet Megastore
At Drive Outlet Megastore, we offer unbeatable Fluke BT521 prices. Engineered for serious battery maintenance professionals, this advanced analyser offers unmatched testing precision, storage, and diagnostics for UPS, telecom, and backup power installations.
Fast UK delivery available – 2-year warranty on all products.
Contact us now for your custom quote or technical datasheet.



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